Paper-bag machine



(No Model.)

W. O. CRO$S.

Paper Bag Machine No. 239,459. 1 Patented March 29,1881.

UNITED STATES PATENT Glance.

WILLIAM C. GROSS, OF BOSTON, MASSACHUSETTS.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent No. 239,459, dated March 29, 1881.

' Application filed January 11, 1881. (No model.)

To all whom it may concern Be it known that I, WILLIAM G. CROSS, of Boston, Suffolk county, Massachusetts, have invented certain new and useful Improvements sult I have heretofore obtained in two Waysby discharging the blank upon that side of a nipper or retaining cylinder whose direction of movement is opposite to that of the blank as it passes to the cylinder, and using in conjunction with said cylinder a reversing-bar to whip the mouth end of the blank around so as to bring it to the front, as described in the application for Letters Patent abovereferred to, and by using in conjunction with the nippercylinder and the carrier which conveys the diamond-folded blank toward the same, an intermediate pocketed transferring cylinder, which receives the blank diamond-folded end foremost and delivers it month end foremost to the nipper-cylinder, as described by me in still another application for Letters Patent now pending. I have devised a different arrangementofparts,which permits me to dispense with the rotary reversing-bar of the one mechanism and the rotary pocketed transferring-cylinder of the other mechanism, and to discharge the blank direct upon the nipper-cylinder5 and it is this last-mentioned arrangement which constitutes the improvement aboutto be described.

The said improvement can best be explained and understood by reference to the accompanying drawings, in which- Figure l is a longitudinal sectional elevation of so much of a satchel-bottom paper-bag machine as needed to illustrate my invention. Fig. 2 is a like elevation of the nipper or reversing cylinder and some of its adjuncts at a different portion of its revolution. from that shown in Fig. 1. Fig.3 is an elevation of said cylinder from the discharge end of the machine. Fig. 4. is a View of a modification hereinafter referred to.

I do not show the mechanisms for making the paper tube, severing the same into baglengths, and making the diamond fold therein. These mechanisms may be of any suitable construction. I can use, for instance, a diamond-fold-formin g mechanism such as shown and described in my Letters Patent No. 221,531, of November 11, 1879. From this mechanism the diamond -folded blank, with paste properly applied along the center line of the diamond fold by paste-wheels E F, Fig. 1, can be delivered to the mechanism about to be described. I also remark that, in order to avoid obscurity and confusion of parts, I have omitted from the drawings the supportingframe and gearing by which the movingparts of the machine are connected and driven. Said gearing and frame may manifestly be of any suitable construction and arrangement, as will be understood without further explanation.

The carrier by which the diamond-folded blank is conveyed to the reversing-cylinder consists of the endless power-driven tapes O and the endless power-driven apron D. Said carrier is arranged and operates substantially in the manner described in my Letters Patent No. 222,465, of December 9, 1879. In conjunction with the carrier I employ stationary inclined folding fingers or wipers E, which operate to fold the front flap of the diamond-folded blank, as described in my Letters Patent No. 232,945, of October 5, 1880. The blank, which is lettered Q, is discharged from between the end rolls, d i, of the carrier diamond fold foremost, with its rear flap, or that flap, m, which overlies the body of the blank, still unfolded. Below the discharge end of the carrier is the rotating power-driven reversing-cylinder A. This cylinder is so placed with reference to the carrier that the blank passing from. the carrier will naturally fall upon that side of the rotating cylinder A whose direction of movement, as indicated by the arrow 1, Fig. 1, is in bar mony with or the same as that of the blank. Itis this feature that enables me to dispense with an adjunct, such as a reversing-bar or the like, which would be necessarywere the blank to fall from the carrier upon that side of the cylinder marked by the arrow 2, whose direction of movement is the reverse of that which the blank has in passing from the carrier. The blank enters between the reversing I springs.

cylinder and a pressure idle-roll, F, whose journals are hung in swinging arms a, mounted loosely upon a cross-rod, I), attached to the frame of the machine. The roll F rests by its weight on the reversingcylinder, and may, in addition, be held up against the same with yielding pressure by means of a spring or In a peripheral recess, 0, in the cylinder is an oscillating nipper, 70, so positioned that at each revolution it will come around in position just in'time to take hold of the month end 2 of the bag-blank, as indicated in Fig. 1, where the nipper is represented in the act of descending upon the mouth end of the bagblank. The nipper is so formed that at each extreme of its movementit is entirely contained within and does not project from the periphery of the cylinder and it bends down the mouth end of the blank into the recess 0 and binds it against the front wall of that recess, as indicated in Fig. 2, andon an enlarged scale in Fig. 5, which is a sideelevation of a portion of the reversing-cylinder, representing an elastic or yielding plate, 0, in the front of the recess 0, the same being designed to act as a clamp for the month end of the blank in con junction with the nipper. The nipper is operated to move forward and back at stated intervals, so as to grasp and release the blank at the proper times, by means of a double arm, f, fixed on the projecting end of the rock-shaft g, upon which the nipper is mounted, and operating in conjunction with wiper-studs h, fixed to and projecting from the frame of the machine into the path of the armf, to throw the nipper forward or backward, as the case may be. A center spring may be attached to the arm f, so as to throw the nipper quickly over so soon as it passes the center on one side or the other. The nipper, having taken hold of the month end of the blank, will carry the blank around the cylinder, gradually bringing the month end of the blank to the front, so that should the nipper make one complete revolution still holding the blank it will have completely reversed the same. It is not necessary, however, that the nipper should continue its hold upon the blank for that length of time. The body of the blank naturally tends to assume a vertical position, and the nipper, as it gets around to a position below the axis of the cylinder, will naturally carry the blank month end first into any suitable mechanism for receiving and finishing the bag. One convenient form of such mechanism is shown in Fig. 1, consisting of endless tapes G, mounted on loose rolls or wheels H, which hold the tapes tightly against a portion of the periphery of the reversing-cylinder, so that the tapes shall be driven by frictional contact and move in unison with the cylinder. The tapes and that portion of the cylinder against which they act constitute a carrier, which receives the blank month end foremostthe nipper, as soon as the blank is well in the bite of the carrier, being thrown back by the lower stud, h, releasing the month end of the blank, which month end rises out of the recess 0 without trouble.

A deflecting plate or table, M, may be used in order to support the blank and throw its diamon d-folded end outward as the nipper moves around with the cylinder.

The tapes G act to determine the line of fold, and flap x is folded by stationary fingers I, attached to the frame of the machine, and the bag thus completed is discharged out from between the final rolls H K.

Stationary elastic or spring guard-fingers attached to the frame of the machine at m, with their free end extending down intosmall annulargrooves n in the periphery of the reversing-cylinder, serve to direct with certainty the bag to pass out between the rolls H K.

The reversing-cylinder makes one revolution for each bag delivered to it from the carrier, and its movement is so timed that the nipper is each time brought around in proper position to take the mouth end of the blank.

A modification of my improvement is shown in Fig. 4. In this modification the nipper grasps the diamond-folded end of the blank instead of the mouth end, as in Fig. 1. The reversing-cylinder A revolves in the direction indicated by arrow 1, and the blank is delivered diamond fold foremost upon that side of the reversing-cylinder whose direction of movement is the same as that which the blank has in passing to the cylinder. The nipper 7c in this modification is arranged and operated in substantially the same manner as hereinbefore described, save that it, in its forward position, lies upon the periphery of the cylinder, as indicated, and not within recess 0.

Vertically below the reversing-cylinder is a second power-driven cylinder, L, and tapes G, and folding-fingers and wipers I, which, in arrangement and operation, are the same as are parts G I, hereinbefore described.

The blank, seized by its diamond end by the nipper, is carried around in the direction in dicated by the arrow until it reaches the position indicated by dotted lines in Fig. 4, at which time the bag-blank, as indicated also by dotted lines, is hanging vertically month end downward just over the entranceto the carrier below. The nipper at this point is thrown back into the recess a, and .releases the blank, which falls mouth end foremost into the bite of the carrier, andis there completed, and subsequently discharged from the machine.

Having described my invention, what -I claim, and desire to secure by Letters Patent, 1s-

1. The combination, with the carrier, from which the blank is delivered diamond-folded end foremost, and mechanism for completing the -folding of the bag delivered from said carrier, of anintermediate rotating reversing-cylinder, to which the blank is delivered from said carrier upon that side which moves in the same direction with the blank, and from which y dmouth end foremostto m hanism, substantially as atilon, substantially as here- ,iof the carrier, the revers- ,arranged so that the blank from the carrier diamondst upon that side ofsaid ving in the same direca 't- I the nipper carried by said cylinder and operated at stated times, as specified, to grasp and release the blank, and 1 mechanism, substantially as described, for rejceiving and holding the blank after it has been reversed.

lire-roll, the nipper-cylinder, and its nipper, havingtheir movements so tinned that the 3. The combination of the carrier, the pressmouthend of the bag-blank (which passes between the said cylinder and roll diamond fold foremost) shall be brought opposite to and grasped by the nipper as the latter revolves with its cylinder, substantially as and for the purpose set forth. a l

4:- lhe combination, substantially as hereinbefore set forth, of the carrier, the pressureroll, the nippercylinder and nipper, having their movements timed with relation to the carrier, substantially as specified, and the bagcompleting mechanism, to which the blank is delivered mouth end foremost from the nipper.

In testimony whereof I have hereunto set my hand this'4th day of January, 18811.

WILLIAM G. GROSS.

Witnesses:

E.O. DICK, N. 0. LANE. 

